HCID 58502815, compound → 2-(4'-Chloro-4-ethylbiphenyl-3-yl)cyclopent-4-ene-1,3-dione

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Reaction Steps

Jones' reagent (126 ml of 1.67 M solution, 210.4 mmol) prepared according to the procedure described above, is added dropwise over 30 minutes to a cooled (ice-bath) solution of 5-(4′-chloro-4-ethylbiphen-3-yl)-4-hydroxycyclopent-2-enone (59.84 g, 191.3 mmol) in acetone (615 ml). The mixture is stirred for 20 minutes, then the cooling bath is removed and the mixture is stirred for 1 hour at room temperature. Isopropanol (500 ml) is added to the yellow slurry and the mixture is stirred at room temperature for 2 hours. The mixture is diluted with ethyl acetate and washed with brine, dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated under reduced pressure to give 2-(4′-chloro-4-ethylbiphen-3-yl)cyclopent-4-ene-1,3-dione (47.94 g) as a yellow solid.

Provenance & Evidence